package com.mccrea.pattern.facade;

/**
 * @Classname Screen
 * @Description 屏幕
 * @Date 2021/5/11 0011 15:31
 * @Created by Mccrea_Gao
 */
public class Screen {
    private Screen() {

    }
    private static final Screen INSTANCE = new Screen();

    public static Screen getInstance() {
        return INSTANCE;
    }

    public void up() {
        System.out.println("屏幕上升");
    }

    public void down() {
        System.out.println("屏幕下降");
    }
}
